<html>
<body>
<h2>Hello World!</h2>
<button onclick="toIndex()">to Index</button>
<button onclick="toFile()">to File</button>
<script type="text/javascript">
    function toIndex() {
        location.href = '/hello/index';
    }

    function toFile() {
        location.href = '/hello/file';
    }

</script>
</body>
</html>
